If I had to narrow it down I'd have to say...
1996, Shaun Alexander's coming out party. He just went absolutely nuts. Still a record no one has broken.
1998, def. one of the top 5 wildest games I've ever seen. The two tipped TD passes to Quincy Jackson were crazy.
2008, another wild one and it kind of really signified that "we're back" more than anything else.
2009, that touchdown to Julio still one of my favorite plays.
2011 (NC), obvious reasons. That one was just sweet.